Does anyone know if these stocks are machined for a simple drop in fit? I don't like the factory stock on my Savage 10fp but, don't have the experience to modify a stock if, need be. I noticed this place has a Varmint stock also. I will be shooting off bags for now at targets. Thanks! http://www.combatstocks.com/Choate_TACTICAL_Stock_for_Savage_Short_ActionCenterfeed_Only.cfm